acrn-hypervisor/hypervisor/debug/printf.c

105 lines
2.9 KiB
C

/*
* Copyright (C) 2018 Intel Corporation. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <hypervisor.h>
#include <hv_lib.h>
#include <acrn_common.h>
#include <hv_arch.h>
#include <hv_debug.h>
static int charout(int cmd, const char *s, int sz, void *hnd)
{
/* pointer to an integer to store the number of characters */
int *nchars = (int *)hnd;
/* working pointer */
const char *p = s;
/* copy mode ? */
if (cmd == PRINT_CMD_COPY) {
/* copy all characters until NUL is found */
if (sz < 0)
s += console_puts(s);
/* copy 'sz' characters */
else
s += console_write(s, sz);
return (*nchars += (s - p));
}
/* fill mode */
else {
*nchars += sz;
while (sz--)
console_putc(*s);
}
return *nchars;
}
int vprintf(const char *fmt, va_list args)
{
/* struct to store all necessary parameters */
struct print_param param;
/* the result of this function */
int res = 0;
/* argument fo charout() */
int nchars = 0;
/* initialize parameters */
memset(&param, 0, sizeof(param));
param.emit = charout;
param.data = &nchars;
/* execute the printf() */
res = do_print(fmt, &param, args);
/* done */
return res;
}
int printf(const char *fmt, ...)
{
/* variable argument list needed for do_print() */
va_list args;
/* the result of this function */
int res;
va_start(args, fmt);
/* execute the printf() */
res = vprintf(fmt, args);
/* destroy parameter list */
va_end(args);
/* done */
return res;
}